Improvement in paper dry gas-meters



leather.

UNITED STATES PATENT OEEIcE.

AUGUST scEussLEE AND CHARLES F. DIETERIOH, on NEW YORK, N. Y.

IMPROVEMENT IN PAPER DRY GAS-METERS.

Specification forming part of Letters Patent No. 144,868, dated November 25, 1873; application filed November 10, 1873.

. oily substances, which are gradually dissolved and washed out by the liquid hydrocarbons, (condensation,) which allows the water and ammonia contained in the gas to enter the The consequence is, that it shrinks and gradually becomes stifl, hence the meter loses its correctness and causes the light to flicker.

The substitute which we have invented for this purpose is not liable to be physically or chemically affected by the gas or its condensed liquids.

We make these diaphragmsfor dry meters from parchment-paper, which is obtained by treating cotton or linen paper with equal parts of sulphuric acid and Water for a few minutes, and then Washing it thoroughly, saturating this product with equal parts of glycerine, acetate of potassa, and Water. In this state the material is pressed into the desired form for diaphragms and inserted into the meters.

What we claim, and desire to secure by Letters Patent, is

The application of paper, when treated substantially in the manner aforesaid, for dry meters, substantially for the purpose set forth.

CHAS. F. IQIETERIOH. AUG. SOHUSSLER. Witnesses:

HENRY NAEF, BENJ. A. MORAN. 

